Features: • 32,768-channel x 8,192-channel blocking switching between backplane and local streams
• 8,192-channel x 8,192-channel non-blocking switching for local input and output streams
• 1,024-channel x 1,024-channel switch between two selected backplane input and output streams
• Rate conversion between backplane and local streams
• Accepts ST-BUS streams with data rate of 16.384Mb/s or 32.768Mb/s for backplane port
• Accepts ST-BUS streams with data rate of 8.192Mb/s for local port
• Per-stream channel and bit delay for the local input streams
• Per-stream channel and bit advancement for the local output streams
• Per-stream bit delay for the backplane input streams
• Per-stream bit advancement for the backplane output streams
• Per-channel constant throughput delay
• Per-channel high impedance output control for local streams
• Per-channel high impedance or driven-high output control for backplane streams
• Per-channel message mode for backplane and local output streams
• Pseudo-Random Binary Sequence (PRBS) pattern generation and testing for local and backplane ports
• Nonmultiplexed microprocessor interface
• Connection memory block programming for fast device initialization
• Tristate-control outputs for external drivers on local port
• Conforms to the mandatory requirements of the IEEE-1149.1 (JTAG) standard
• 1.8V core supply voltage
• 3.3V I/O supply voltage with 5V tolerant I/O's
• Non-multiplexed microprocessor interface
• Connection memory block programming for fast device initialization
• Tristate-control outputs for external drivers on local port
• Conforms to the mandatory requirements of the IEEE-1149.1 (JTAG) standard
• 1.8V core supply voltage
• 3.3V I/O supply voltage with 5V tolerant I/O's
Application• Mediation switches
• High capacity TDM switching platforms utilizing DS-3/OC-3 rates
• Central office switches
• Access equipmentSpecifications
| |
Parameter |
Symbol |
Min |
Max |
Units |
| 1 |
Core Supply Voltage |
VDD_CORE |
-0.5 |
2.5 |
V |
| 2 |
I/O Supply Voltage |
VDD_IO |
-0.5 |
5.0 |
V |
| 3 |
Input Voltage |
VI_3V |
-0.5 |
VDD + 0.5 |
V |
| 4 |
Input Voltage (5V tolerant inputs) |
VI_5V |
-0.5 |
7.0 |
V |
| 5 |
Continuous Current at digital outputs |
Io |
|
15 |
mA |
| 6 |
Package power dissipation |
PD |
|
2 |
A |
| 7 |
Storage temperature |
TS |
- 55 |
+125 |
|
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.
DescriptionThe MT90868 Digital Switch provides switching capacities of 32,768 x 8,192 channels between backplane and local streams, 8,192 x 8,192 channels among local streams and 1,024 x 1,024 channels among two selected backplane streams.The local port has sixty-four input and sixty-four output streams which operate at 8.192Mb/s. The backplane port of MT90868 has sixty-four input and sixty-four output streams which operate at 16.384Mb/s or 32.768Mb/s.
The MT90868 has features that are programmable on per-stream or per-channel basis including message mode, input bit delay, output bit advancement, constant throughput delay, high impedance output control for both local and backplane streams and the driven-high backplane output control.
MT90868 Data Sheet
